Main Characters:
1. Sonic the Hedgehog (SEGA)
2. Mario (Nintendo)
3. Link (Nintendo)
4. Megaman (Capcom)
5. Goku (Toei Animation)
6. Naruto (Viz Media)
7. Ichigo Kurosaki (Shueisha)
Secret Characters:
1. Knuckles the Echidna (SEGA)
2. Tails the Fox (SEGA)
3. Donkey Kong (Nintendo)
4. Yoshi (Nintendo)
5. Wario (Nintendo)
6. Pac-Man (Bandai Namco Entertainment)
7. Akuma (Capcom)
Boss Characters:
1. Shadow the Hedgehog (SEGA)
2. Metal Sonic (SEGA)
3. Bowser (Nintendo)
4. Ganondorf (Nintendo)
5. Dr. Wily (Capcom)
6. Frieza (Toei Animation)
7. Pain (Viz Media)
8. Aizen Sosuke (Shueisha)
Note: Each character has variations such as different costumes, power-ups, and transformations that affect their abilities in the game.